Hey, anyone know where to find concept art for any of the MI games? For example I see some awesome concept art above in the title bar. The one on the right is done by Steve Purcell, isn't it? Anyone know where to find a full sized version / higher resolution?

You can find a bigger version of the voodoo image on the Scumm Bar and possibly MixnMojo. It's not concept art as such, but rather the original artwork for the scene before it was compressed into 1991 quality. Tragically, every scene in the game was drawn with quality like that but only two (Captain Dread's shore and the voodoo house) were released.

The art on the left is a custom piece of art that was made specially for this forum a few years ago by Dan Lee. He also illustrated the first two headers for MixnMojo's 'Secret History' article series: